pg_lo_export
(PHP 4 >= 4.2.0, PHP 5)
pg_lo_export — Export a large object to file
說明
pg_lo_export() takes a large object in a PostgreSQL database and saves its contents to a file on the local filesystem.
To use the large object interface, it is necessary to enclose it within a transaction block.
Note: This function used to be called pg_loexport().
參數
- connection
-
PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().
- oid
-
The OID of the large object in the database.
- pathname
-
The full path and file name of the file in which to write the large object on the client filesystem.
Return值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
範例
Example#1 pg_lo_export() example
<?php
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$oid = pg_lo_create($database);
$handle = pg_lo_open($database, $oid, "w");
pg_lo_write($handle, "large object data");
pg_lo_close($handle);
pg_lo_export($database, $oid, '/tmp/lob.dat');
pg_query($database, "commit");
?>